On 01/31/2015 06:48 AM, Russell King - ARM Linux wrote:
On Fri, Jan 30, 2015 at 06:32:23AM -0500, Yakir Yang wrote:+static void hdmi_config_audio(struct dw_hdmi *hdmi, + struct hdmi_audio_fmt *aud_fmt) +{ + if (aud_fmt) + hdmi->aud_fmt = *aud_fmt; + + hdmi_modb(hdmi, AUDIO_CONF0_INTERFACE_II2S, + AUDIO_CONF0_INTERFACE_MSK, HDMI_AUD_CONF0); + + hdmi_modb(hdmi, hdmi->aud_fmt.chan_num, AUDIO_CONF0_I2SINEN_MSK, + HDMI_AUD_CONF0); + + hdmi_modb(hdmi, hdmi->aud_fmt.word_length, AUDIO_CONF1_DATWIDTH_MSK, + HDMI_AUD_CONF1); + + hdmi_modb(hdmi, hdmi->aud_fmt.dai_fmt, AUDIO_CONF1_DATAMODE_MSK, + HDMI_AUD_CONF1);These registers are not defined on iMX6 SoCs, so this probably needs to be conditionalised with the dw-hdmi IP version.
okay, i will fixed what you have suggest in cover-letter first. Thanks. : )
This function will be called by other driver (dw-hdmi-audio), both modify the variable "hdmi->audio_enable", so i add the mutex-protected.+void hdmi_audio_clk_enable(struct dw_hdmi *hdmi) +{ + if (hdmi->audio_enable) + return; + + mutex_lock(&hdmi->audio_mutex); + hdmi->audio_enable = true; + hdmi_modb(hdmi, 0, HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS); + mutex_unlock(&hdmi->audio_mutex);This is racy. The test needs to be within the mutex-protected region.
+} + +void hdmi_audio_clk_disable(struct dw_hdmi *hdmi) +{ + if (!hdmi->audio_enable) + return; + + mutex_lock(&hdmi->audio_mutex); + hdmi_modb(hdmi, HDMI_MC_CLKDIS_AUDCLK_DISABLE, + HDMI_MC_CLKDIS_AUDCLK_DISABLE, HDMI_MC_CLKDIS); + hdmi->audio_enable = false; + mutex_unlock(&hdmi->audio_mutex);Ditto.
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